【摘要】 借助四电极法,研究了粉煤灰及矿渣微粉对水泥石电阻率的影响规律。结果表明:掺粉煤灰水泥石体系的电阻率变化趋势随着龄期的延长由慢变快;在前期,水泥石的电阻率与粉煤灰掺量成反比且低于基准样;在后期,水泥石的电阻率与粉煤灰掺量成正比且超过基准样。水泥石电阻率与矿渣微粉掺量成正比,并且随着龄期的延长其增长速率由快变慢;二者复合能更好的体现其"叠加效应",在一定龄期内,可以实现电阻率的持续增长。更多还原

【Abstract】 With the aid of four-probe method,this article has studied the influence rule of fly ash and slag-micropowder to the cement paste resistivity.The result indicated that,with age lengthening,the variational tendency of cement paste resistivity added fly ash changed from slowly to quickly;in the earlier time,the cement paste resistivity was inverse to the quantity of the fly ash also lower than the datum type;In the later time,the cement-paste resistivity was direct to the quantity of the fly ash and also surpassed the datum type.The cement-paste resistivity was direct to the quantity of slag-micropowder and with the age lengthening,its resistivity increased from quickly to slowly.In the certain age time,the two compound can manifest "superimposition effect" better and may make resistivity grow durative.更多还原